Abstract
The switching of thin anisotropic magnetic films by sinusoidal fields varying in frequency from 103 to 106 cps and having amplitudes up to 18 Oe has been studied and the results compared with both theory and previous pulse-field measurements. As the amplitude of the switching field is increased, it is concluded that the reversal mechanism changes from irreversible domain wall motion to nonuniform rotation of the magnetization, the point at which the transition occurs increasing with frequency. This conclusion is in disagreement with previously published work. A possible dependence of the switching coefficients on film thickness is also noted.
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